Q. Which of the following statement is true about k-NN algorithm?
1) k-NN performs much better if all of the data have the same scale
2) k-NN works well with a small number of input variables (p), but struggles when the number of inputs is very large
3) k-NN makes no assumptions about the functional form of the problem being solved

• (A) 1 and 2
• (B) 1 and 3
• (C) only 1
• (D) 1,2 and 3